Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| MIAMI INTERNATIONAL HOLDINGS, INC.MIAX · Entity 4026 | EVP, GC & Corporate Secretary | September 02, 2026 | September 04, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
MIAMI INTERNATIONAL HOLDINGS, INC.
Report date September 02, 2026 · Filed September 04, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 839,564 |
Ending reported balance
After 2026-09-02 transaction · row 2
2 source rows · reconciled sequenceRow 1 · 2026-09-02 · Exercise / conversion · Acquired 44,445 · Balance 884,009 F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 18, 2025. Row 2 · 2026-09-02 · Sale · Disposed 44,445 · Balance 839,564 F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 18, 2025. F2: This transaction was executed in multiple trades throughout the day at prices ranging from $39.66 to $41.80. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected. |
| Nonqualified Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $12.00 · Expires 2028-05-28 | Direct | 44,444 |
Reported balance
After 2026-09-02 transaction · row 3
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 3 · 2026-09-02 · Exercise / conversion · Disposed 44,445 · Balance 44,444 F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 18, 2025. F3: The options are fully vested. |
Filing footnotes · ownership attribution and instrument terms
F1: This transaction was effected pursuant to a previously established Rule 10b5-1 Plan adopted by the Reporting Person on December 18, 2025.
F2: This transaction was executed in multiple trades throughout the day at prices ranging from $39.66 to $41.80. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.
F3: The options are fully vested.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| August 15, 2025 Filed Aug 19, 2025 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | ConversionNonvoting Common Stock · Derivative | 130,617 | $0.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040787 · wk-form4_1755633977.xml · derivative · entry 4 Comly Barbara J. · CIK 0002080878 · EVP, GC & Corporate Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 130,617 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · derivative.exercise_price: Represents 130,617 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date. F2 · shares: Represents 130,617 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date. F2 · derivative.exercise_date: Represents 130,617 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date. F2 · derivative.expiration_date: Represents 130,617 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date. Read SEC document |
| August 15, 2025 Filed Aug 19, 2025 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | ConversionSeries B Preferred Stock · Derivative | 100,500 | $0.00 | $0.00 |
DisclosureSEC source: 0001628280-25-040787 · wk-form4_1755633977.xml · derivative · entry 3 Comly Barbara J. · CIK 0002080878 · EVP, GC & Corporate Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Common Stock · 100,500 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · derivative.exercise_price: Represents 100,500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date. F1 · shares: Represents 100,500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date. F1 · derivative.exercise_date: Represents 100,500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date. F1 · derivative.expiration_date: Represents 100,500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date. Read SEC document |
| August 15, 2025 Filed Aug 19, 2025 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | ConversionCommon Stock | 130,617 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001628280-25-040787 · wk-form4_1755633977.xml · nonDerivative · entry 2 Comly Barbara J. · CIK 0002080878 · EVP, GC & Corporate Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 811,960 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F2 · shares: Represents 130,617 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date. F2 · price: Represents 130,617 shares of Nonvoting Common Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's IPO and which have no expiration date. Read SEC document |
| August 15, 2025 Filed Aug 19, 2025 20:06 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | ConversionCommon Stock | 100,500 | Not disclosed | Not disclosed |
DisclosureSEC source: 0001628280-25-040787 · wk-form4_1755633977.xml · nonDerivative · entry 1 Comly Barbara J. · CIK 0002080878 · EVP, GC & Corporate Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 811,960 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · shares: Represents 100,500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date. F1 · price: Represents 100,500 shares of Series B Preferred Stock that have been converted into shares of Common Stock on a one-for-one basis upon the closing of the Company's initial public offering ("IPO") and which have no expiration date. Read SEC document |
| August 13, 2025 Filed Aug 15, 2025 20:48 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Tax withholdingNonvoting Common Stock · Derivative | 25,050 | $23.00 | $576,150.00 |
DisclosureSEC source: 0001628280-25-040561 · wk-form4_1755290935.xml · derivative · entry 2 Comly Barbara J. · CIK 0002080878 · EVP, GC & Corporate Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 130,617 Underlying: Common Stock · 25,050 shares Expires not disclosed F2 · derivative.exercise_price: The shares of nonvoting common stock are convertible on a one-for-one basis into shares of common stock commencing at any time. The nonvoting common stock has no expiration date. F1 · shares: Represents shares that have been surrendered to the Company to satisfy tax withholding and remittance obligations in connection with the net settlement of restricted stock awards and does not represent a sale by the reporting person. F2 · derivative.exercise_date: The shares of nonvoting common stock are convertible on a one-for-one basis into shares of common stock commencing at any time. The nonvoting common stock has no expiration date. F2 · derivative.expiration_date: The shares of nonvoting common stock are convertible on a one-for-one basis into shares of common stock commencing at any time. The nonvoting common stock has no expiration date. Read SEC document |
| August 13, 2025 Filed Aug 15, 2025 20:48 UTC | MIAMI INTERNATIONAL HOLDINGS, INC. MIAX · Entity 4026 | Tax withholdingCommon Stock | 288,075 | $23.00 | $6,625,725.00 |
DisclosureSEC source: 0001628280-25-040561 · wk-form4_1755290935.xml · nonDerivative · entry 1 Comly Barbara J. · CIK 0002080878 · EVP, GC & Corporate Secretary 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 580,843 F1 · shares: Represents shares that have been surrendered to the Company to satisfy tax withholding and remittance obligations in connection with the net settlement of restricted stock awards and does not represent a sale by the reporting person. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.